Typical Applications
| Used for parts that are extensively
machined and require the corrosion resistance of a
13% chromium stainless steel |
| Applications include screw machine
products, bolts, nuts, gears, shafts, valve parts,
axles, fasteners, and fittings |
Machinability
Types 416 and 416 Se have excellent machinability. Types
416 and 416 Se provide good surface finishes.
Weldability
Welding Types 416 and 416 Se requires special handling.
Weldability to these types can be improved by using methods
that minimize dilution of the weld metal with the melted
base metal. Reducing the time that welds are in the hot-shortness
temperature range and use of Type 312 (29-9) filler metal
help obtain satisfactory results.
Formability
Type 416 can be midly cold worked. Type 416 Se has somewhat
better formability but is not recommended for severe cold
working. Where severe cold working is required, 410 should
be considered. |
Corrosion Resistance
Types 416 and 416 Se Stainless Steels have useful levels
of corrosion resistance to such media as natural food
acids, waste products, basic and neutral salts, natural
waters and most atmospheric conditions. They have
adequate resistance for many applications where dampness
and chemical activity normally cause rapid deterioration
of mild and low alloy steel.
For best corrosion resistance, a smooth surface finish
free from scale, contamination and foreign particles is
recommended. It is desirable to passivate finished parts
for 20 to 30 minutes in a solution of warm 20% nitric
acid (by volume) plus 4 to 6% sodium dichromate (by weight).
Heat Treatment
ANNEALING: For maximum softness heat to 1550-1650°
F hold for sufficient time, and furnace cool slowly to
1100° F. For cold forming operations, uniformly
heat to 1350-1450° F, hold for sufficient time and
air cool.
HARDEN: Heat to 1700-1850° F, hold for sufficient
time, and air cool.
STRESS RELIEF: Heat to 300-800° F, hold for sufficient
time and air cool.
TEMPER: Heat to 1100-1400° F, hold for sufficient
time and air cool |
